Making sense of life as we know it, in the light of evolution.

Now that’s a mouthful

A new study released in the journal Microbiome (it’s open-access!) has concluded that “intimate kissing” that lasts at least 10 seconds can transfer 80,000,000 bacteria between the participants’ mouths. So many microbes sloshing around – it’s a little bit gross, a little bit cool, and 100% science.